Aries has specific limitations, such as poor TCP emulation and reliability concerns. Cray is working hard to ameliorate them, and some of them can be worked ar

Aries has specific limitations, such as poor TCP emulation and reliability concerns. Cray is working hard to ameliorate them, and some of them can be worked around, but there are those who do not like Aries, and they tend to be loud about it. You don't tend to see people strongly praising it (aside from Cray salespeople).